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No. 752,220. PATENTE) FEB. 16, 1904.

E. HALLBY & R. 11 DOWNBY.

` VALVE.

APPLIUATIGN FILED H1B. 9, 1903,

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i @MOY/w' i UNITED STATES Patented February 16, 1904.

PATENT i OEEICE.

EDWARD HALLEY, OF MONTAGUE, MICHIGAN, AND RICHARD F. DOWNEY, OF MILWAUKEE, WISCONSIN, ASSIGNORS, BY DIRECT AND MESNE AS- SIGrNMENTS,A TO NATIONAL VALVE COMPANY, OE MILWAUKEE, W'IS- ooNsrN.

VALVE.

SPECIFICATION forming part of Letters Patent No. 752,220, dated February 16, 1904. Application filed February 9, 1993. Serial No. 142,538. NO IJlUSl-l To all whom t may concern:

Beit known that we, EDWARD HALLEY, a resident of Montague, in the county of Muskegon and State of Michigan, and RICHARD F. DowNEY, a resident of Milwaukee, in the county of Milwaukee and State of VVisconsin, citizens of the United States, have invented certain new and useful Improvements in Valves; and we do hereby declare that the fol- IO lowing is a full, clear, and exact description thereof.

Our invention relates especially to valves controlling steam-passages; and it consists in certain peculiarities of construction and combination of parts, as will be Jfully set forth hereinafter in connection with the accompa- 'nying drawing and subsequently claimed.

The said drawing is a vertical sectional view of a valve embodying our said invention. Referring by numerals to the drawing, 1 represents the upper part of the valve-casing having a central vertical smooth bore therethrough, which bore is enlarged in its upper part, as shown at 2, for the reception of a metal packing-ring 3, forming, in conjunction with the screw-cap L1, a stuffing-box for the valve-rod 5 passing up therethrough, the upper end of said rod having then a hand-wheel 6 attached thereto. The described bore in the said upper part 1 of the casingis further and more greatly enlarged in the lower part, as shown at 7, the walls of this part of the bore being preferably hexagonal, as shown, to reoeive a similarly-shaped nut 8, the valve-rod 5 having at this point a series of external v screw-threads 9 for engagement with the threaded bore of the said nut 8. J ust below this series of threads is a collar 10, rigid with said rod 5, and at a short distance below this collar the said'rod has a series of screw-threads 1l of much less pitch then the threads 9, and below the series of threads 11 a double series of threads 12 of double the pitch of said threads 9 and extending to the lower end of said rod 5. The upper part 1 of the valvecasing has a lower annular flange 13, with interior screw-threads for engagement with the correspondingly externally-threaded upper annular ange 14 of the valve-body 15, and a cup 16, against which the nut 8 abuts, has an upper annular horizontal iiange 17, which rests on the said flange 14 of the valve-body and is held between said flange and the opposing surface of the part 1, the said cup having a' central aperture 18 of a size suicient to permit the passage of the collar 10. on the valve-rod 5 therethrough. .I ust below said collar 10 is the upper'valve 19, held to place on rod 5 by nut 20, which engages with the series of screw-threads 11 for this purpose, the described lower double series of screwthreads 12 beginning just under the line of the said nut 20, said last-named threads being in engagement with the nut 21, which carries (integral therewith) the lower valve 22, the said valves "19 and 22 being, respectively, abovehand below the annular ring 23, which forms a two-faced valve-seat, the upper valve 19 closing down on the upper face 24 of said ring 23 and the lower valve 22 closing up against the lower face 25 of said ring in the operation of the device, as hereinafter described. The valve-body 15 has a steam- Vinlet passage 26 and steam-outlet passage 27 (suitably screw-threaded for connection with the necessary steam-pipes) and below the line of these passages is formed with a lower annular flange 28, having interior screw-threads for engagement with the correspondingly exteriorly-screw-threaded flange 29 of the lower part 30 of the valve-casing. The described annular ring or two-faced valve-seat 23 is supported within the valve-body 15 by an upper wall 31 on one side and a lower wall 32 on the opposite side, so that the steam in its passage through the valve-body from the inlet-passage'26 must pass under one of said walls, then through the central opening of the ring V23 and over the other of said walls, and out' through the outlet-passage 27, as'indicated by the arrows, and the lower wall 32 is provided with one or more vertical feathers 33 and the edge of the lower valve 22 with one or more corresponding vertical grooves 34: for engage- -ment therewith to prevent the rotation of the lower threads 12 on the rod 5 is double that of the upper threads 9, and as the said rod 5 is rotated in one direction by its hand-wheel 6 the upper valve 19 is brought downupon the upper face 24 of the valve-seat 23 and the lower valve 22 brought up against the lower face 25 of said valve-seat when the valve is in the vertical position shown in the drawing, and there is no appreciable steam-pressure. There being pressure in the valve-casing and the rod 5 being turned to close the valves against their seat, said pressure will cause a lifting of said valves and said rod, with the nut 8 thereon, the distance of what has up to this time been clearance between said nut and the upper end of the bore enlargement 7 in the part 1, there then being space between the bottom of. said nut 8 and the cup 16, and hence in the continued rotation of the rod 5 the said nut 8 will travel downward in the play-space beneath it and the valve 19 come to its seat against the upper face 24 of the valve-seat 23, the two valves closing practically simultaneously. The words upper and lower are used relatively with regard to the position of the device shown in the drawing; but it will be understood that our valve may be located horizontally or in any other position, dependent upon the necessities of the case in any instance, and the operation of the parts referred to will be the same, although the words upper and (3 lower might not be technically applicable in such changed positions of the valve.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is

1. In a valve, the combination with the valve-body having a central two-faced valveseat, of a valve-rod having an upper and lower series of screw-threads passing therethrough and carrying a valve on each side of said valveseat, a vertically-movable' non-rotatable nut in engagement with the upper series of screwthreadson said valve-rod, and means for closing said valves against said seat, and for withdrawing them therefrom.

2. In a valve, the combination with the valve-body having a central two-faced valve- Seat, of a valve-rod passing therethrough, and

having an upper and lower series of screwthreads formed externally thereon, the pitch of the lower threads being practically double that of the upper threads; a nut in engagement with the upper threads, said nut being vertically movable within limits, but held against rotation; an upper valve held fast to said rod between said two series of screwthreads thereon, and a lower valve having a nut integral therewith, said lower nut being in engagement with said lower series of screwthreads on said rod, and said lower valve being held against rotation, in its vertical movement.

In testimony that we claim the foregoing we have hereunto set our hands, at Milwaukee, in .the county of Milwaukee and State of Wisconsin, in the presence of two witnesses.

EDWARD HALLEY. RICHARD F. DOWNEY. Witnesses:

H. Gr. UNDERwooD, N. E. OLIPHANT. 

